/*
 * Tencent is pleased to support the open source community by making 蓝鲸 available.
 * Copyright (C) 2017 Tencent. All rights reserved.
 * Licensed under the MIT License (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * http://opensource.org/licenses/MIT
 * Unless required by applicable law or agreed to in writing, software distributed under
 * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * setTimeout 模拟 setInterval
 */
export default function interval(func, wait) {
  let timer = null

  const interv = function (nowTimer) {
    if (timer !== nowTimer) return
    func.call(null)
    setTimeout(() => interv(nowTimer), wait)
  }

  const clearTimeInterval = () => {
    clearTimeout(timer)
    timer = null
  }
  const setTimeInterval = () => {
    if (timer) return
    timer = setTimeout(() => interv(timer), wait)
  }

  return {
    clearTimeInterval,
    setTimeInterval
  }
}
